/*
 * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.activiti.common.util;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatExceptionOfType;

import java.time.DateTimeException;
import java.time.Duration;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.ZonedDateTime;
import java.time.format.DateTimeParseException;
import java.util.Date;
import org.junit.jupiter.api.Test;

public class DateFormatterProviderTest {

    private final DateFormatterProvider provider = new DateFormatterProvider("yyyy-MM-dd[['T']HH:mm:ss[.SSS][XXX]]");

    @Test
    public void should_returnDate_when_stringRepresentsADate() {
        String dateStr = "1970-01-01";

        Date date = provider.toDate(dateStr);

        assertThat(date).hasTime(0);
    }

    @Test
    public void should_returnDate_when_stringRepresentsADateWithTimeInformation() {
        // Formats without milliseconds
        long time =
            Duration.ofHours(1).toMillis() + Duration.ofMinutes(1).toMillis() + Duration.ofSeconds(1).toMillis();

        String dateStr = "1970-01-01T01:01:01";
        Date date = provider.toDate(dateStr);
        assertThat(date).hasTime(time);

        dateStr = "1970-01-01T01:01:01Z";
        date = provider.toDate(dateStr);
        assertThat(date).hasTime(time);

        dateStr = "1970-01-01T01:01:01+00:00";
        date = provider.toDate(dateStr);
        assertThat(date).hasTime(time);

        dateStr = "1970-01-01T02:01:01+01:00";
        date = provider.toDate(dateStr);
        assertThat(date).hasTime(time);

        dateStr = "1969-12-31T23:01:01-02:00";
        date = provider.toDate(dateStr);
        assertThat(date).hasTime(time);

        // Formats including milliseconds
        time = time + 1;

        dateStr = "1970-01-01T01:01:01.001";
        date = provider.toDate(dateStr);
        assertThat(date).hasTime(time);

        dateStr = "1970-01-01T01:01:01.001Z";
        date = provider.toDate(dateStr);
        assertThat(date).hasTime(time);

        dateStr = "1970-01-01T01:01:01.001+00:00";
        date = provider.toDate(dateStr);
        assertThat(date).hasTime(time);

        dateStr = "1970-01-01T02:01:01.001+01:00";
        date = provider.toDate(dateStr);
        assertThat(date).hasTime(time);

        dateStr = "1969-12-31T23:01:01.001-02:00";
        date = provider.toDate(dateStr);
        assertThat(date).hasTime(time);
    }

    @Test
    public void should_throwException_when_stringIsNotADate() {
        String dateStr = "this is not a date";

        assertThatExceptionOfType(DateTimeParseException.class).isThrownBy(() -> provider.parse(dateStr));
    }

    @Test
    public void should_returnDate_when_longIsProvided() {
        long time = 1000;

        Date date = provider.toDate(time);

        assertThat(date).hasTime(time);
    }

    @Test
    public void should_returnDate_when_dateIsProvided() {
        Date initialDate = new Date(1000);

        Date date = provider.toDate(initialDate);

        assertThat(date).isEqualTo(initialDate);
    }

    @Test
    public void should_returnDate_when_localDateIsProvided() {
        LocalDate localDate = LocalDate.now();

        Date date = provider.toDate(localDate);

        assertThat(date).isEqualTo(Date.from(localDate.atStartOfDay(provider.getZoneId()).toInstant()));
    }

    @Test
    public void should_returnDate_when_localDateTimeIsProvided() {
        LocalDateTime localDateTime = LocalDateTime.now();

        Date date = provider.toDate(localDateTime);

        assertThat(date).isEqualTo(Date.from(localDateTime.atZone(provider.getZoneId()).toInstant()));
    }

    @Test
    public void should_returnDate_when_zonedDateTimeIsProvided() {
        ZonedDateTime zonedDateTime = ZonedDateTime.now();

        Date date = provider.toDate(zonedDateTime);

        assertThat(date).isEqualTo(Date.from(zonedDateTime.toInstant()));
    }

    @Test
    public void should_throwException_when_isNotAStringADateOrALong() {
        double value = 1.2;

        assertThatExceptionOfType(DateTimeException.class)
            .isThrownBy(() -> provider.toDate(value))
            .withMessageContaining("Error while parsing date");
    }
}
